Fluid simulation not continuous flow
You can always increase the Timesteps in the Domain which calculates more data inbetween frames to make it smoother which then applies to all fluid objects in the domain.
Or, if you have different fluid objects in the domain, you might only want to increase the Sampling Substeps on the fast moving Flow object (the picture shows the default values for Domain and Flow).

For more details check the Blender Manual:

Adaptive Time Steps
Sampling Substeps